Envelop.



J. P. ANDERSON.

Patented Mar. 24, 191 i ww/wlioz \IPHNDER sou ilNi JAMES P. ANDERSON, 0F LISBON, NORTH DAKOTA.

ENVE'LOP.

To all whom it may concern Be it known that I, JAMES P. ANDERSON, citizen of the United States, residing at Lisbon, in the county of Ransom and State of North Dakota, have invented certain new and useful Improvements in Envelo-ps, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to improvements in envelops and has for its primary object to provide a simple, cheap and secure closure of this character which cannot be opened by unauthorized persons without detection.

Another object of the invention is to devise an envelop cut to provide a plurality of foldable flaps, certain of said flaps being folded upon the body of the envelop to provide a pocket for the letter sheet, and additional flaps foldable upon said letter receiving pocket and adhesively secured thereto and to each other.

Another object of the invention is to provide an envelop structure provided with a foldable pocket to receive the letter sheet and inclosing guard flaps to be folded upon and secured to the body wall of said pocket, said pocket being open upon one side from which the letter may be readily extracted.

With the above and other objects in view as will become apparent as the description proceeds, the invention consists in certain constructions, combinations and arrangements of the parts that I shall hereinafter fully describe and claim.

For a full understanding of the. invention reference is to be had to the following description and accompanying drawings, in which- Figure 1 is a plan view of the blank from which the envelop is formed; Fig. 2 is a similar view showing certain of. the flaps folded and secured together to provide the letter sheet receiving pocket. Fig. 3 is a similar view showing a further step in the folding of the envelop; Fig. 4 is a plan view showing the envelop completely folded; and Fig. 5 is a section taken on the line 55 of Fig. 4.

Referring in detail to the drawings, 5 designates a sheet of paper which may be of any desired texture in accordance with the particular purpose for which the envelop 1s to be used. This paper sheet is cut to form the blank shown in Fig. 1, said blank including front and back walls designated 6 Specification of Letters Patent.

Application filed March 1, 1913.

Patented Mar. 24, 1914.

Serial No. 751,580.

and 7 respectively. The back wall is integrally connected to the front wall at its lower longitudinal edge and is adapted to be folded upon the latter as will be later disclosed. At opposite ends of the front wall 6, the same is provided with end flaps 8 and a substantially triangular shaped flap 9 is also provided upon the other longitudinal edge of the front wall 6.

The back Wall 7 of the envelop is provided upon each end with a flap 10, said flaps extending the entire width of the wall 7 and each being of a length exceeding one half of the length of the back wall so that the flaps will overlap at their ends, when they are folded upon said wall. The end of one of these flaps is provided with ad hesive material indicated at 11 so that they will retain their proper folded positions. The back wall .7 is provided upon its free longitudinal edge with a narrow longitudinal flap 12 which is adapted to be folded. upon the end flaps 10 after the same have been properly folded and secured together at their overlapping edges. This latter flap 12 is also provided upon its edges with a suitable adhesive 13, so that the same will adhere to the flaps 10 when it is folded thereon. The flaps l0 and 12 together with the back wall 7 are thus seen to constitute a pocket within which the letter or other matter to be mailed is placed. The flaps 10 at theends thereof which are connected to the body wall 7 are also provided with an adhesive material 14: so that when the pocket containing the letter sheets is folded upon the back face of the front wall 6, said pocket at its ends will securely adhere to said wall. The flaps 8 and 9 extending from the edges of the front wall 6 are also provided upon their margins with a suitable adhesive 15.

The back wall 7 of the envelop body has a longitudinal slit 16 cut therein and to the face of said wall which is opposed to the flaps 10 when the same are folded, a strip of paper 17 is secured over said slit. It is, however, to be understood that the edges of this slit are not attached to the paper strip 17 but are free therefrom. After the pocket has been properly formed by the folding of the flaps 10 and 12 and the letter sheets placed therein, this pocket is folded over upon the face of the front wall 6. The flap 9 on the longitudinal edge of said front wall is now brought downwardly over the back wall 7 and the tip of adhesive on the margins of the flaps 8 adhering to the wall 7 and flap 9 while the end of one of the flaps 8 overlaps the other and adheres thereto. In this manner, it

v will be apparent that access to the tip of the flap 9 is rendered extremely diflicult, and even if the flaps 8 were detached by steaming the same, any attempt to remove the flap 9 would resultin tearing off the tip of said flap 9 which adheres to the paper strip 17 on the inner face of the rear wall 7. The addressee may, however, easily and quickly remove the contents of the envelop by simply tearing the ends of the flaps 8 'and 9 which will expose the open side of the pocket within which the letter sheets are arranged, so that the letter can be readily removed.

From the foregoing, it is believed that the construction and manner of operation of my improved envelop will be clearly and fully understood. It will be noted that I have eliminated the use of metallic fasteners and similar securing devices so that all liability of injury to the contents of the envelop is obviated. The parts of the envelop blank may be very easily and quickly folded to retain the letter or other matter within the envelop. Owing to the simple construction of the device, it will be seen that the same can be produced at comparatively small cost. It will of course be obvious that the envelop may be made in various sizes. The same may also be produced in other form than that shown in the drawings, and I therefore reserve the right to make such minor alterations therein as may fairly fall within the scope of the appended claim.

Having thus described the invention, what is claimed is: a

An envelop comprising front and back walls, said back wall being provided with foldable flaps adapted to be adhesively secured together to form a pocket to receive the letter sheets, a flap on one of the longitudinal edges of said back wall foldable upon said end flaps, said back wall. being centrally provided with a longitudinal slit, flaps formed on the longitudinal and end edges of the front. wall, the flap on the longitudinal edge of said front wall being adapted for insertion through the slit in said back wall, said end flaps being provided with an adhesive and foldable upon said back wall and the flap on the longitudinal edge thereof and over the slit in said back wall to adhere to said flap and the back wall and to each other.

In testimony whereof I hereunto afiix my signature in the presence of two witnesses.

JAMES P. ANDERSON.

Witnesses HARLEY S. GRovnR, ELMER T. SANDAGER.

I Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

